David Shiffman - Profile and Journalist Details
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David Shiffman
Verified
Contributor, Freelance
Washington
Beats
technology healthscience environment
Content
By David Shiffman| Scuba Diving Magazine Verified 03/29/2025 - Mako sharks have thin, sharp teeth for piercing their prey. Shutterstock.com/Lukas Walter Question: Different shark species have radically different shaped teeth, so much so that you can identify what species a tooth came from. Why is that? And why do sharks lose so many teeth and keep regrowing them? To answer this question, I spoke with Dr. Lisa Whitenack, a Professor of Biology at Allegheny College who is an expert in the form and function of shark teeth.
By David Shiffman| Sport Diver Magazine Verified 03/29/2025 - Mako sharks have thin, sharp teeth for piercing their prey. Shutterstock.com/Lukas Walter Question: Different shark species have radically different shaped teeth, so much so that you can identify what species a tooth came from. Why is that? And why do sharks lose so many teeth and keep regrowing them? To answer this question, I spoke with Dr. Lisa Whitenack, a Professor of Biology at Allegheny College who is an expert in the form and function of shark teeth.
By David Shiffman| Scuba Diving Magazine Verified 03/29/2025 - Mako sharks have thin, sharp teeth for piercing their prey. Shutterstock.com/Lukas Walter Question: Different shark species have radically different shaped teeth, so much so that you can identify what species a tooth came from. Why is that? And why do sharks lose so many teeth and keep regrowing them? To answer this question, I spoke with Dr. Lisa Whitenack, a Professor of Biology at Allegheny College who is an expert in the form and function of shark teeth.
Company Info
Freelance
Freelancer.com is the largest freelancing and crowdsourcing marketplace in the world, connecting over 81 million employers and freelancers across more than 247 countries. Founded in 2009 and based in Sydney, Australia, the platform allows employers to post jobs while freelancers can bid on these projects. It is publicly traded on the Australian Securities Exchange under the ticker ASX:FLN. The platform supports a variety of work categories, including software development, writing, design, and marketing. Freelancer.com also offers contests for creative work, where employers can award prize money to winning entries. Users can choose from different membership plans, including free and paid subscriptions, which provide various benefits. The mobile app enhances project management and communication for users on the go. With a diverse customer base that includes individuals, small businesses, and large enterprises, Freelancer.com plays a significant role in the global online economy.
De Pere, Wisconsin, United States